Clamping device



April 7, 193.1.'

c. H. HlsER CLAMPING DEVICE Filed Feb. 15, 1929 INVENTOR EY M ATTORNEYSA A y A further object of the invention is to provide an arrangementy inwhich the brackets to Y 11i-l lid or rcoverof a vshipping case vorreceptacle Patented Apr. 7, 1931 GASKET coivrrANr, forsramerrnnnoidnooRPoRArrIoN "or OHIO? f y Y :maaar-1 i oHAaLEs-H. HISER;or SPRINGFIELD, oHIdfAssIe-Noitzrro THE SPRINGFIELn Mn'rALLof j oLnMrINGDEvIeEV' Application'led'February 13, 19729. "Serial No14 339,714.

This inventionrelates to improvements in clamping devicesfilt moreparticularlyy'relating to a clamping device kof the .typewhich employ-s'a hinged arni and a clamping lever carried thereby. v i, j, l

One of'y the Objects of my. invention is to` provide improved means for.positioning the clamping leverrelatively to the surface with' vwhich itcoacts, ammore specilicobjectin this connection being to provideaclampingidee.y

' vice, the pressure of whichniay bereadily in,-A

x meet conditionsof use.

creased ordecreased as occasion l demands to Aurther objecty theinvention is to provide y'for stiening the end of the arin to which theclamping lever is pivotally conl nected to enable the arm at that pointto resist the strains applied thereto during the clamping operation.- n

` Alfurther object of the invention'is to provide an arrangement inaclamping device of the character referred -to whereby the arm and itsclamping lever will Ybe mounted in proper relation with the surface tobe clamped.

which the clamps are attached to therecep-v tacle also act to-stiffenthe gasket receiving y grooved portion of the receptacle.

A further object of the invention is to provide a simple, inexpensiveand durable clamping'device effective forthe purpose for which itisdesigned.

In the accompanying drawings: p Fig. 1 is a front elevation of aclamping -device embodying 'my improvements shown applied to a containerand its lid, a only of each of which is shown.

Fig. 2 is a vertical section onthe line 2-2 of Fig. 1. .v j Fig.,3 is atopplanyview of the parts. The improved clamping device yhas beenmorevparticularly designed for clamping the portion i Wtion of such areceptacle is indicatedat 1 and a part ofthe lid at2'. Theedgeso'f'thelid are formedwith a horizontal portion`2 having af anY air-,tightreceptacle is provided.' v ,Iy Y

lurali-ty of down-turned*-f1ange2ff along itsQonter -jandthis horizontalportion is designed to be clamped against a gasket?, y which is seatedin l a groove Jformed in ilange lfextending about the edges or'v thereceptacle, ',When the horizontalportion .2. of the cover is presseddownon` the gasketwith sufficient pressure I It will be :understood/that"a :p l clampingdevices such assho'wn are provided about the receptacle,only onegoisuch clampprovided a; bracket formed of l a vU-shapedmetallic memberfl whichlis'- secured to the Ving. devices .being shownin the ...present l instance.r For eachi'clainpingv device there 1S sideVof thereceptacle ljby-spot welding or n any other suitable means, thebracketfbeingsecured to the'. receptacle with the upper edegs pont this.member against the pressure of the gaskets... t. ,i Hingedtogal -pintle5i carriedkbyv the `legs 11 is a flat arm 8 of'sheet metal,thelowerle'nd of this arm beingurled Sinto an*l eyef9 gto*l oflits lsidelegs'pressedfasfiirmly,aspossible againstthe channel member `1 `so as tosupeencircle the fpintle@ The vfupper enolof;V the arm Iis bentfattheplacesy indicatedatt-11,andrr y 12-`to impart-'to that 'end-ofthe.arma -lJ{shape,y the arm beingso bentV astoclear. the fiange,` with theU-shaped portionoverhangingthe; horizontal portion 2..v The webbetweenthe legsofvthe-Ushaped portion ofthefarm -is provided, with athreadedaperture lto Vre-A Y ceive a screw-r which@ forms a? stop for ablock ljwhigch .is mounted `upon iapinid` which projectsl throughslotted openings 1f?` and. 11S-.in thelegs of the- U-.shaped portion.Also-.mountedmponone end .of the. pin is a" `vcam 119', being securedthereonby rivetingthe endlof the pinas shown',.an,d theV pin is :con:` lfined in position by this cam andsalsoby engage ,the horizont/alportion;2501 'thelfidlr head-.20upon its opposite end..,The yc'a1n1'19`7 i p hasaleverj 21 by whichfit maybero'atedpto The block15islinountedgbetween'theilegslof d Y `limits allowedfby the'flowerends of theislo's Q y isturned to cause the cam to impinge the horizontal surface 2 the blockmoves up- 2 regardless of any inequality in manufac ture. v .v I n Theproportion and design of the improved clamp is such that the cam, whenthe arm 8 is swung to clamping position, isl approxif mately over thecenter of the gasket or at a point on Athe horizontal surface 2 well re-Vmoved from the outer edge thereof. It will Valso be noticed that thepivotalpoint of the arm 8 is slightly within a-vertical line passingthrough the center'of the cam sol that any tendency of the arm 8 toswing from clamping position with the cam in clamping relation Ywith thehorizontal surface 2 will be resisted by that portion of the horizontalj surface which is'on'the outside of the cam,

as the arc of the circle upon which the contacting point4 of thecamwould have to swing would necessarily pass through thisv horizontalsurfacel Therefore, kif the clamping device should meet with any blowwhich would tend to dislodge the same, this tendency would be resistedby the horizontal sur face 2 coactingjwith the contacting face ofthecam; n Y The block 15 besides coacting with vthe screw 13 to adjustthe position ofthe cam also'actsto stiien the U-shaped portion of thearm under the clamping [action so that there is no tendency for theouter end of the arm to bend when the pressureis applied.'

Having thus described my, invention, I,

claim: v

1. vIn a clamp of the character described, a hmged arm, a cam leverpivotally mounted on the free end of said arm, the pivot of saidv leverbeing movable in the direction of the `length of the arm, and anadjustable stop therefor.

U- shaped 'portion' of said ar1n,a stop for saidblock, and a cam leverpivotally connected with said block. V'

3. In a clamp of the character described, a

hingedarm having its free end benthtor a U-forrn, the walls of theU-shaped portion provided with slottedl openings, a block` mounted inthe U-shaped portion of said arm, a vpin carried by said'block extendingthrough sai'dslots', a cam lever mounted on vsaid pin, and ascrewcarried by the arm forming an adjustable stop for 'said'block 4.The combination with ya fcontainer'havv a gasket receiving channeland alid hav# ing `a horizontal *portionr cooperating with said channel, a-U'-svh'aped bracketfs'ecured to said container with the upper edgesthereof in close proximity to the lower side of said channel, an armpivotally connected to said bracket having its free end overhanging thehorizontal portion of said lid, and a clamping member carried bythe freeend of said arm.

5. In a clamp of the character described, a hinged arm with its free endbent to a U- form, a block slidably mounted in, the U- shaped portion ofVsaid arm, an adjustable stop forV said block'carried by` said arm, apivot `pin carried by said block extending through slotted openings insaid U-shaped portion, and a cam lever connected with said pivot pin onthe outer side ofthe free branch of the U-shaped portion of said arm.

6. The combination with a container hav.

ing a. gasket receiving channeland a lid havingfa horizontal portioncooperating with said channel, a bracket securedto said container Vwiththe upper edges thereof in close proximity to the lower sideA of saidchannel to supportV said channel, and clamping devices to clamp thehorizontal portion of said 'lid to saidchannel pivotally connected withsaid bracket.

In testimony whereof, I have hereunto set my hand this 4th day ofFebruary, 1929.

' CHARLESH. HISER.

